As with many of the National electronics nixies of this era, the ink on the tubes rubs off easily. So the tube you receive may or may not have the full legend visible. Displays look better than the pictures. It's hard to get a good picture of the Nixie. Pictured at 170V with 9.1K anode resistor.
There's also a picture of the size difference between the NL-840 and the NL-807. The last picture is a comparison of a NL-807 vs a NL-840 in a nixie tube clock. You are purchasing 4 pcs of the NL-807 NOS. Please ask all questions before purchasing.